Photographic reproduction apparatus



Jan. 12, 1932. M.z|`|-FER VON TEscHENBRucK 1,841,229A PHOTOGRAPHIC REPRODUCTIO-APPARATUS Filed May l0, 1930l J www?? Patented Jan. 12, 1932 UNITED STATES PATENT OFFICE JMIANO ZIFFER VON TESCHEN BRU' CK, OF BASEL, SWITZERLAND, ASSIGNOR 0F ONE-HALF TO KARL MAYER, OF BASEL, SWITZERLAND PHOTOGRAPHIC REPRODUCTION APPARATUS .Application led May 10, 1930, Serial No. 451,386, and in Switzerland May 18, 1929.

rlhis invention relates to apparatus for the production of photographic duplicates by means of a photo-luminous element.

Nowadays photo-luminous elements are frequently used for photographic reproduction, i. e. papers, cards, plates etc., which have the property after treatment with a photoluminous substance, of storinuf up light upon being illuminated and of emitting the same or phosphorescing in the dark. If such a photo-luminous elementwoften called Luminophor for short, after having been exposed to light, is brought together with the object to be reproduced, for example written matter, on a plate provided with a lightsensitive layer and placed in the dark, the exact latent reproduction of the original is obtained by'means of the light-giving Luminophor and has only to be developed in the usual manner. This method of reproduction is known, but there is not in existence a practical apparatus which can be readily operated by anyone, for effecting this procedure.

According to the present invention apparacates of written, drawn, or printed matter or the like, by means of a photo-luminous element is provided to meet the need hereinbefore referred to, this apparatus having one frame-part arranged to contain a source of light and another frame-part arranged to receive the original to be reproduced 'together with a light sensitive material for receiving the reproduction, in combination with a carrier for receiving a photo-luminous element, means beingprovided for allowing a relative movement between the photo-luminous element carrier and t-he frame-part carrying the original to be reproduced and the light sensitive material, in such a manner that after illumination of the photo-luminous v element, the latter can be moved so as to act through v.the original on the light sensitive material. j

The accompanying drawings show by way lof example only anembodiment of'the invention, in the form of a box adapted to be opened on a hinge, Figures 1 and 2, being vertical sections of the apparatus while in use, and Figure 3 a plan view of the same with the Luminophor carrier removed. Figure 4 shows the box closed and containing the Luminophor carrier, which is shown in section in Figure 5.

The apparatus illustrated in the drawings is in the form a box adapted to be opened on a hinge and consisting of a lower part B and an upper part C. The parts B and C of the box are of equal height so that when the box is open the upper surfaces of the parts B and C lie in one plane and their lower surfaces in another plane.

The apparatus still comprises the Luminoin the lower part B of the box (Figure 4),

and when the box is opened may be placed for use on the part C and rolled from the latter over the part B and back.

The Luminophor carrierAhas a frame a, which has a recess for receiving a slide c accommodating the Luminophor b. The frame a is provided at one side with a roller d, of rubber for example. Furthermore,

mosphere, a glass plate f is provided in the y frame a, which is rendered air tight by means of felt. For stability, the Luminophor carrier is loaded bya weight g, which may consist of a plate of iron,lead, etc. o

When the box is open the lower part B is arranged to received an original t to be reproduced, this being placed over the light sensitive paper The lower part B of the box is provided with a groove j and with two recesses jl for receiving respectively roller d and rolling balls e of the Luminophor carrier, so that the latter comes to rest in the groove y' and the recesses jl when the Luminophor carrier A is rolled over the part B there are provided on the opposite side of the tus for the production of photographic duphf connected in a suitable manner to a lighting circuit by means of plugs and sockets.

. The electric circuit of said illuminating devices, which includes the contact members l and contact springs m-contains a contact device fn, (Figure 5), the movable member of which is controlled by awcontrolling pin 0, which projects through the cover plate C1 of the part C of the box. The cover plate C1 contains a matt glass plate C2 and has a groove p and recesses p1 corresponding to those j, jl of the lower part B of the boX, which also serve for determining position of the Luminophor carrier A on the box part C.

When a reproduction is to be made, the apparatus is opened in a dark room, the Luminophor carrier A is placedin the position shown in Figure 1 on the part C of the box, and the apparatus is connected to a lighting circuit. As the sliding roller d in this positionof the carrier A, presses down the controlling pin o, the contact device n is closed and current .passes through the illuminating devices c. The light thus radiated is stored in the Luminophor b in the carrier A. In the meantime, the original to be reproduced has been placed on top of a light sensitive paper on the part B of the box. Now the Luminophor carrier A is rolled over the part B of the box. Thereby the lighting circuit is automatically opened at the contact device 11, owing to the release of the pin o. Then` the Luminophor b acts as source of light for the light sensitive paper i in order to produce a latent picture thereon. When the original or the light sensitive paper is sufficiently exposed, the Luminophor carrier A is rolled back over the part C of the box for the purpose of urther chargingV the"Luminophor b with radiant energy whilst the paper z' is removed and the latent picture developed. The hereinbefore described procedure may then be repeated indeinitely. V

It will be evident that these and other modiiications may be made in the invention which is not limited to the particular construction and arrangement of parts hereinbefore described which may be varied as desired vto suit particular requirements without exceeding the scope of the invention.

What I claim is:

1. An apparatus for the production of photographic' duplicates o written, drawn, or printed matter or the like, by means of a photo-luminous element, comprising two frame-parts, the one arranged to contain a source of light and the other arranged to receive the original to be reproduced together with a light-sensitive material :for receiving the reproduction, in combinaton with a carriertfor receiving a photo-luminous element and guiding means to allow relative movementibetween the photo-luminous element Ycarrier and the frame-parts carrying respectively the source of light and the original.

2. An apparatus for the production of photographic duplicates of written, drawn, or printed matter or the like, by means of a photo-luminous element, comprising two rameparts, hinged together like parts of a box, the one arranged to contain a source of light and the' other arranged to receive the original to be reproduced together with a light-sensitive material for receiving the reproduction, in combination with a carrier for receiving a photo-luminous element, said frame-parts, when being in open position, being arranged to constitute a rolling surface for the photo-luminous element carrier, so as to allow same to be shifted Jfrom one framepart to the other.

3. An apparatus for the production of photographic duplicates of written, drawn,`

dependence ofthe movement of said photo-.

luminous element carrier.

In witness whereof I have hereunto signed 'Y my name thisth day of April, 1930.

yMAH() ZIFFER vpn TESCHENBRUCK. 

